903272.fig.001a
(a)
903272.fig.001b
(b)
903272.fig.001c
(c)
903272.fig.001d
(d)
Figure 1: Selected regions of the FTIR spectra for the SDS molecule: (a) C–H stretching vibrational features; (b) methylene scissoring vibrational mode; (c) and (d) sulfate asymmetric and symmetric stretching bands, respectively. The spectra refer to the SDS packing densities: ; ; ;  molecules cm−2.